A small molecule that induces translational readthrough of CFTR nonsense mutations by eRF1 depletion

Jyoti Sharma, Ming Du, Eric Wong, Venkateshwar Mutyam, Yao Li, Jianguo Chen, Jamie Wangen, Kari Thrasher, Lianwu Fu, Ning Peng, Liping Tang, Kaimao Liu, Bini Mathew, Robert J. Bostwick, Corinne E. Augelli-Szafran, Hermann Bihler, Feng Liang, Jerome Mahiou, Josef Saltz, Andras RabJeong Hong, Eric J. Sorscher, Eric M. Mendenhall, Candice J. Coppola, Kim M. Keeling, Rachel Green, Martin Mense, Mark J. Suto, Steven M. Rowe, David M. Bedwell

Research output: Contribution to journalArticlepeer-review

Abstract

Premature termination codons (PTCs) prevent translation of a full-length protein and trigger nonsense-mediated mRNA decay (NMD). Nonsense suppression (also termed readthrough) therapy restores protein function by selectively suppressing translation termination at PTCs. Poor efficacy of current readthrough agents prompted us to search for better compounds. An NMD-sensitive NanoLuc readthrough reporter was used to screen 771,345 compounds. Among the 180 compounds identified with readthrough activity, SRI-37240 and its more potent derivative SRI-41315, induce a prolonged pause at stop codons and suppress PTCs associated with cystic fibrosis in immortalized and primary human bronchial epithelial cells, restoring CFTR expression and function. SRI-41315 suppresses PTCs by reducing the abundance of the termination factor eRF1. SRI-41315 also potentiates aminoglycoside-mediated readthrough, leading to synergistic increases in CFTR activity. Combining readthrough agents that target distinct components of the translation machinery is a promising treatment strategy for diseases caused by PTCs.

Original languageEnglish (US)
Article number4358
JournalNature communications
Volume12
Issue number1
DOIs
StatePublished - Dec 2021

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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